check engine light on 1991 Toyota Camry

how do I reset the check engine light to turn it off. I know how to read the codes and find the problems and repair them but I don't know the procedure to get the dash light to go out. It won't pass smog with the check engine light on.
Thanks

You can just disconnect the negative battery terminal for 30 seconds on an early Toyota and that will do the trick. If the light comes right back on, there is another code or the code is still not properly repaired. Let me know if this helps I have a lot of experience with OBDI Toyotas.